Mastervolt Whisper 6

INSTALLATION
US / WHISPER 6/8/11 / July 2009 / Copyright © 2009 Mastervolt 17
2 GROUNDING
With the U.S.A. models neutral of the AC
alternator is grounded. The housing of the
alternator and all other metal parts are
grounded as well.
The connection between “neutral” and “ground” is
necessary as part of a insulation failure protection system
as commonly used in the U.S.A.
WARNING
In all situations the transfer switches between
shore, inverter and generator should switch all
connections, the phase line(s) (L) as wel as
neutral (N). Off course this is the case when
using a Mastervolt Masterswitch
For safety reasons connect the main ships ground to
negative point of the generating set start battery. When a
ungrounded DC system or positive grounded DC system is
applied the battery negative should not be connected to
the main ships ground.
3 CABLE
For the power cable we recommend the oil resistant cable
with the following cross sectional area:
Model cross sectional area
Whisper 6 – 120-240V
3600 rpm
4xAWG12 / 4 mm²
(15ft / 5m. included)
Whisper 6 – 120V
3600 rpm
3xAWG6 / 10 mm²
(not included)
Whisper 8 – 120-240V
3600 rpm
4xAWG12 / 4 mm²
(15ft / 5m. included)
Whisper 8 – 120V
3600 rpm
3xAWG6 / 10 mm²
(not included)
Whisper 11 – 120-240V
3600 rpm
4xAWG6 / 10 mm2
(not included)
Whisper 11 – 120V
3600 rpm
3xAWG4 / 16 mm2
(not included)
One wire for earth is included. For longer cables it is
recommended to apply cables with a larger cross section
(refer to ISO 13297 annex A).
4 TRANSFER SWITCH
A power source selector switch much be installed between
the generating set and the ship’s electrical supply system.
This switch must ensure that all AC consumers can be
switched off at once. This switch should also be installed
to keep the generating set and shore (grid) power systems
separate.
Transfer switches - to switch over from shore to ship or
from generating set to inverter - should be well designed to
switch over all wires including neutral (and not only phases
or line) and there should be provisions with the aid of
timers to prevent relays from clattering.
Mastervolt recommends the installation of a Mass
Systemswitch as the power source selector. This works
automatically when the generating set is not running the
input remains in the shore position and as soon as the
generating set is running the Mass Systemswitch switches
automatically after 10 seconds delay time over to the
generating set position.